A method for forming a panel for an assembled product including, such as a furniture product, wherein the method includes: displacing the first panel in a feeding direction by a conveyor through a first edge machine, working, by a first tool of the first edge machine, on a first edge of the first panel to obtain a decided location of the first edge, attaching, by a second tool of the first edge machine, a covering material, such as a laminate strip, a thermoplastic strip or a veneer strip, on the first edge, and forming a first edge groove, by a third tool of the first edge machine, along the first edge and on a first main surface of the first panel, wherein the first edge groove is configured to be a part of a locking device.